Fluid-gage.



PATENTED APR. 21, 1 908.

M. MARTIN. FLUID GAGE. APPL IOATION FILED MAY 14, 1906.

' UNITED era-Tins PAEENT caries. MORRIS MARTIN, 0F 'ALnnii, MASSACHUSETTS, ASSIGNOR T0 BOSTON AUTO GAGE conrixr,

a or BOSTON, MASSACHUSETTS, A-CQR-PORATION or nAssAcir-nissrrs.

- FLUID-GAGE Specification of Letters Patent.

Patented April 21, 1908.

" I Application filed May 14, 1906. Seria1-No. 316,649.

chusetts, have invented an Improvement n F luid-Gages, of whichthefollowing description, in connection. with the accompanying I drawings, is a specification, like letters on the .drawlngs representmghke parts.

This invention has forjits object the product onof-anovel fluid gage to indicate the depth of a quantity of fluid in atank.

'Mynovelgage comprises acap having a bearing'for. ashaft, provided with a pinion anda float actuated gear. to rotate said shaft and turn an indicating needlein a gage head located at a distance from the tank. The actuating gear has a depending portion, on which is anadjustablecollar that holds a float sustaining arm, and said arm is adjustable longitudinally in said collar. The shaft having the gear referred to carries a flexible driving member, shown as a wire extended- .through a pipe connected with a gageh'ead; the opposite end of said wire being connected with a shaft sustained in said head and provided with a magnet. Therpi )e referred to isconnected, air and fluid tight, with'a cap iocated in the tank and the gage head,

in any suitable 1n-anner,i;;sby a union joint.

Figure 1 shows in section a-tank provided with a gage embodying my invention, the tank being connected by a pipe with the gage head also shown in section. Fig. 2 is a face view of the head: Fig. 3 is'a section below the dotted line-a2, Fig. 1; Fig. 4 is a 1nodifi-,

cation to be described;

The tank A, of any suitable material and shape, besides the usual filling opening, will have soldered or connected with it a bushing a. The interior of the bushing has a shoulder on which is laid a packing a on which in turn is laid -a late at having a hub a provided with a ho e to receive a short shaft 1) to be described. The plate a is clamped air tight in the bushing by a screw-threaded ring a The shaft b is shown as provided with an enlargement above the huba and bored for part of its length and the lower end of the shaft is provided with a bevel pinion 6?, that,

is engaged by a sector d mounted on a shaft (Z sustained in lugs (Z depending from. the under side of the plate o The sector has a depending arm 3, on which is mounted a col. lard adapted to be held in any adjusted position on said arm by a set screw 4,

bevel gear b as 2 to '1.

The collar has a hole therethrough at right angles to the dc pendin'g arm that receives the end of'an arm (2 provided with a float c, said arm being adjust-able longitudiii-all in said collar to accommodate tanks of various length, the arm being held in its adjusted position by a set screw 5. In practice, the collar (1 will be adjusted on the depending arm 3 according to the depth of the tank, and the teeth on the sector will compare with the teeth onthe The gage head is shown as a box 9 havmg s hub 10 threaded externally to receive-a threaded ring it forming part of a union joint,

the inturned flange at the ou'ter cnd ol' said ring meeting an outturned flange of a nipple 12, a acking being inserted between the flangec I end of the nipple and the end'of the head 10, so that when the ring ll is screwed down tight, a fluid and air tight joint made between the nipple and the head. The nippic 12 has secured to it, gas and fluid tight,

a tubef that at its opposite end is connected in like manner with a similar nipple 13, the flanged end of. which, a suitable packing having been introduced between it and the projectiona is clamped, gas and fluid tight, to the projection by means oi a threaded. union 14, in all particulars the same as the union 10.

The .hole in the upper end of the short shaft 1) receives a wire, or flexible member I, employed to rotate a shaft 71/ depei'iding from a magnet 71 one end of said flexible member being connected with shaft 1) F 1 by a screw 15, while the other end is conneoted with the shaft h by a screw 16.

The boxy is suitably secured to a portion B, supposed to be )art of a dasher of an automobile, orother iixed part, where it is desired to expose the gage head. The open top of the box receives upon it a plate L- having a suitable pivot to receive a magnetic pointer m, said plate having suitable scale markings or indications, see Fig. 2, over which said pointer is moved by the magnet 11?. The

under side of the plate rests on a washer, Fig.

1, laid on the circular'edge of the box The plate It is held in adjusted working position with relation to the magnet by a screw ring n that confines the plate to the box, and fluid tight. The outer face of the ring n receives a glass cover 0 that is held in position by a screw ring p.

i/Vith the tank containing liquid, as shown in Fig. 1, the quantity being that which should 71 ordinarily be indicated full, the pointer .m will point to F on the dial, see Fig. 2, and as the float descends from the position, Fig. 1, to the bottom of the tank, the sect-or will turn the shaft 1), and through. the flexible connection uniting said shaft with the shank 1 71, of the ma net \vill rotate the. ma net in the direction of the arrow Fig. 2 once.

The apparatus shown is adapted to be applied to a pressure tank and it is essential that the tubef connected with the detachable plate sustaining the float, and the gagchead should be absolutely air tight, or, in other Words, the pipe should prevent any air that might get thereinto from the tank from escaping from said pipe. I

Instead of using the wire to transmit the motion from the shaft Z to the shaft 71 I may use other flexible connections, for instance,

at each end, chain such as is used in watch movements, or the connection may be entirely of chain, and in such event, the chain Will be wound on the up )er end of the shaft I), see Fig. 4, and wili be led therefrom through an Leshaped nipple 1", to which is connected gas and fluid tight the pipef, the opposite end of the pipe entering a like nipple 7 said chain being connected at its farthest end to the shaft h, from which it may be unwound, for instance, by the movement of the float, turning to .the sector d" the shaft being moved in an opposite direction by a spring 1" surrounding the same.

The spring r surrounding the shaft 71/ may be wound as the chain is being wound on the shaft 1) the float then descending, and as the float rises under the action of fluid, the spring 7" will unwind and turn the magnet and pointer in the direction from empty to full. llaving fully described my invention, what I claim as new and desire to secure by Letters Patent is:

in a fluid gage, a bushing having a shaft and adapted to be connected with a tank, a gage head remote from said tank, a magnet having a shaft and a magnetic needle both sustained in said head. combined with a pipe connecting said bushing and head gas and fluid tight, flexible connections attached at one end to the shank of the magnet, and

; at its other end tothe shaft in said bushing, a piece of wire 1" wlth a piece of fine hnk chain 1 l i l 1 i l i l l i a float, and means intermediate said float and the shaft in the bushing to rotate said shaft as the float rises and falls due to level of fluid in the tank, the flexible connection rotating the magnet and the latter turning with. it the magnetic needle.

in testimonywhereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

MORRIS MARTIN.

Vitnesses:

Geo. W. GREGORY, ELIZABETH R. MORRISON. 

